Effect of free volume on cryogenic mechanical properties of epoxy resin reinforced by hyperbranched polymers

Yalin Zhao; Rongjin Huang; Zhixiong Wu; Hua Zhang; Zhengrong Zhou; Laifeng Li; Yun Dong; Mi Luo; Bangjiao Ye; Hongjun Zhang

Materials & Design (Apr 2021)

Effect of free volume on cryogenic mechanical properties of epoxy resin reinforced by hyperbranched polymers

Yalin Zhao,
Rongjin Huang,
Zhixiong Wu,
Hua Zhang,
Zhengrong Zhou,
Laifeng Li,
Yun Dong,
Mi Luo,
Bangjiao Ye,
Hongjun Zhang

Affiliations

Yalin Zhao: CAS Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Beijing 100049, China; Centre of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
Rongjin Huang: CAS Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Beijing 100049, China; Centre of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China; Corresponding author at: CAS Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Beijing 100049, China.
Zhixiong Wu: CAS Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Beijing 100049, China; Centre of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
Hua Zhang: CAS Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Beijing 100049, China
Zhengrong Zhou: CAS Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Beijing 100049, China; Centre of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
Laifeng Li: CAS Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Beijing 100049, China; Centre of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
Yun Dong: State Key Laboratory of Particle Detection and Electronics & Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China
Mi Luo: State Key Laboratory of Particle Detection and Electronics & Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China
Bangjiao Ye: State Key Laboratory of Particle Detection and Electronics & Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China
Hongjun Zhang: State Key Laboratory of Particle Detection and Electronics & Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China; Corresponding author at: CAS Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Beijing 100049, China.

Journal volume & issue: Vol. 202
p. 109565

Abstract

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Thermosetting polymer materials with excellent mechanical properties are highly promising in cryogenic engineering applications. However, the research on the toughening mechanism of thermosetting materials at cryogenic temperatures is always difficult. Herein, one type of high strength hyperbranched epoxy composite was successfully fabricated, and the correlation between microstructure (free volume) and mechanical properties of the HPB/epoxy composites was studied. To disclose the correlations between mechanical properties and microstructures for these composites, positron annihilation lifetime (PAL) measurements were carried out. Thereafter, better impact and compression properties were observed for composites with smaller free volume holes. Meanwhile, the impact and tensile properties of the composites are positively correlated with the free volume holes fraction at 77 K. The correlation between microstructure and mechanical properties provide valuable information for regulating the cryogenic mechanical properties of thermosetting materials in the future.

Published in Materials & Design

ISSN: 0264-1275 (Print); 1873-4197 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/materials-and-design

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